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Finding the Fourth Proportional to 279,387.52, 385,727.04 and 192,321.28

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Solution

The fourth proportional to 279,387.52, 385,727.04 and 192,321.28 is: 265,521.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,387.52 : 385,727.04 = 192,321.28 : x
  2. Step 2: Convert to fraction form
    279,387.52/385,727.04 = 192,321.28/x
  3. Step 3: Cross multiply
    279,387.52x = 385,727.04 × 192,321.28
  4. Step 4: Simplify right side
    279,387.52x = 74,183,518,063.41
  5. Step 5: Solve for x
    x = 74,183,518,063.41/279,387.52
  6. Step 6: Final answer
    x = 265,521.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.